The Seven Wolf Princes and the Little Lamb

After high schooler Yuki Gondou's mother passes away in a tragic car accident, 7 young men appear, telling her they are her brothers who have come to bring her home. In her deepest memories, she can still recall the bond she had with her long-lost brothers and a mysterious song they sang together. In her new home, she is treated like a princess, spoiled and lavished with their love, but Yuki has a feeling that their "love" is much more sinister than it seems...